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Proxy Traffic for Price Monitoring: How to Estimate Monthly GB

A formula, a way to measure real response sizes and a worked example with clearly assumed numbers.

1. The traffic formula

Monthly traffic is one multiplication:

bytes per response × products × countries × checks per day × days in the month

Each factor is a decision you make. The first one, bytes per response, depends on what the server sends back. A rendered product page includes HTML, style sheets, scripts and images; a structured data endpoint, when the site offers one, returns only the fields. Measure a real sample before you pick a package. The pay-per-GB proxies guide explains how per-GB billing works.

2. How to measure a real response size

Two free tools give actual byte counts, so you do not have to guess.

2. How to measure a real response size

  1. In the browser

    open Chrome DevTools with Control+Shift+J (Command+Option+J on a Mac), open the Network panel and reload the page. Chrome's documentation describes the Size column as the resource amount transferred over the network.

  2. From the command line

    curl's --write-out option prints information after a transfer, and its size_download variable is, in the curl manual's words, the total amount of bytes downloaded, the size of the body or data transferred, excluding headers. For example: curl --silent --output /dev/null --write-out '%{size_download}' URL

  3. Sample, then average

    measure at least five different products, add up the bytes and divide by five. Use that average in the formula.

  4. Allow for headers

    because size_download excludes headers, and requests have overhead, round the final monthly figure up.

3. Why a data endpoint uses less traffic than a full page

A rendered page loads markup, styles, scripts and images in addition to the price. A data endpoint returns only the fields you ask for, such as name, price, currency and availability, so a response can be many times smaller. The exact ratio depends on the site, so measure both if both exist.

Using the assumptions in Section 4, a 2 MB rendered page instead of a 200 KB response would make the same job transfer about 30 GB instead of 3 GB, which is 27 GB more. Use the lighter source whenever the site offers one that you are allowed to use.

4. Worked example (assumed numbers)

All numbers in this table are assumptions chosen to show the arithmetic. They are not measurements of any site.

4. Worked example (assumed numbers)

Response size: 200 KB

Products tracked: 50

Countries: 5

Checks per day, per product and country: 2

Days per month: 30

Assumed values for illustration only; replace them with your own measurements. For simple arithmetic this guide uses 1 GB = 1,000,000 KB.

Step by step:

4. Worked example (assumed numbers)

  1. Requests per month

    50 products × 5 countries × 2 checks × 30 days = 15,000 requests.

  2. Traffic per month

    15,000 × 200 KB = 3,000,000 KB.

  3. Convert to GB

    3,000,000 KB ÷ 1,000,000 = 3 GB.

5. What that costs

Dynamic residential traffic on the Economy line starts at US$1.5/GB and larger packages are cheaper. 1 PTC equals US$1, and purchased traffic does not expire. Full rates are on the pricing page. The figures below use only the starting price, so they are an upper bound for the same traffic.

5. What that costs

5. What that costs
ItemMonthly trafficCost at US$1.5/GB
A: 50 products, 5 countries, 2 checks a day, 200 KB3 GBUS$4.5
B: 200 products, 10 countries, 3 checks a day, 200 KB36 GBUS$54

Both scenarios are assumptions. Scenario B: 200 × 10 × 3 × 30 = 180,000 requests × 200 KB = 36,000,000 KB = 36 GB; 36 × 1.5 = 54.

5. What that costs

Because traffic does not expire, buying a bit more than one month needs is not wasted: what is left stays in the wallet for later months.

6. Per GB or per IP

Billing per GB suits jobs that visit many countries a few times a day: each request is small and you pay for what you use. Billing per IP suits a task that needs one address to stay the same for a period. A static ISP IP is rented per IP, US$0.5 for 1 day or US$7.99 for 30 days, with the same price in every country, and it stays fixed during the lease. A datacenter IP is US$0.25 for 1 day or US$3.99 for 30 days.

As pure arithmetic, US$7.99 equals about 5.3 GB at US$1.5/GB (7.99 ÷ 1.5), and US$3.99 equals about 2.7 GB. These are different products, so the comparison only shows how much per-GB traffic the same money buys. Choose by what the job needs: many countries and small requests point to per-GB, and one fixed address points to per-IP.

7. Plan a first month

  1. Step 1

    Measure five real responses (Section 2).

  2. Step 2

    Put the average into the formula and compute the monthly GB.

  3. Step 3

    Check that each country's exit really lands in the right place, as described in checking prices in other countries.

  4. Step 4

    Start with a package that covers your estimate plus some headroom, then compare the wallet's actual usage with your estimate after a week.

  5. Step 5

    For the full setup of a multi-country job, see the price monitoring page. Proxy302 does not offer a free trial, so measure on your own connection first and spend only once the estimate looks right.

How to do it with Proxy302

Dynamic residential traffic on Proxy302 is billed per GB, from US$1.5/GB on the Economy line and US$5/GB on the Premium line, with lower prices on larger packages. 1 PTC equals US$1, and purchased traffic does not expire.

Replace the assumed numbers with your own measured response size, then buy for the monthly GB you calculated.

How to do it with Proxy302: steps

  1. Step 1

    Open the product page that fits (static ISP, rotating residential or the ISP for AI subscriptions) and pick the region, traffic or lease term, and quantity. For per-IP products also choose HTTP or SOCKS5.

  2. Step 2

    After the proxy is generated, open My assets and copy HOST, PORT, USERNAME and PASSWORD.

  3. Step 3

    Open https://ipinfo.io/json through the proxy and check that the country and org fields (ASN and organization) are what you expected.

  4. Step 4

    Then compare network type and native or broadcast on the IP purity check page. Two tools disagreeing is normal; go by your actual use.

Prices and limits

Rotating residential starts at US$1.50 per GB on the Budget line and US$5 per GB on the Premium line; larger packages are cheaper per GB, and purchased traffic has no expiry. A static ISP IP is US$0.50 for one day or US$7.99 for 30 days, the same in every country, fixed for the lease. A datacenter IP is US$0.25 for one day or US$3.99 for 30 days. Stock changes daily, so go by the order page. The smallest purchase is 1 GB of traffic or one IP for one day. Changing IP does not lift a restriction or raise a limit; what happens to an account is up to the platform.

Proxy302 at a glance

Proxy302 at a glance
ItemPriceProtocolsLocations
Rotating residentialFrom US$1.50 per GB (Budget line); US$5 per GB (Premium line); lower per GB in larger packagesHTTP, SOCKS5195+ countries and regions; state and major city on lines that support it (small towns and some connections exit at country level; no city level in Russia and Singapore)
Static ISP, per IPUS$0.50 for 1 day, US$7.99 for 30 days, the same in every countryHTTP or SOCKS5, chosen per IP30 countries on the order form; stock changes daily
ISP for AI subscriptionsPer 30 days: Claude 15 PTC, GPT / Grok 10 PTC, Gemini 8 PTCHTTP or SOCKS5Claude: US, UK, DE, JP. GPT / Grok: US, UK, FR, JP, KR. Gemini: US, UK, FR, JP
Datacenter, per IPUS$0.25 for 1 day, US$3.99 for 30 daysHTTP or SOCKS5, chosen per IP8 countries

Prices are in PTC, paid from the wallet; 1 PTC = US$1. There is no free trial: the smallest purchase is 1 GB of rotating residential traffic or one IP for one day. Checked on 9 November 2026.

FAQ

How do I find the real size of a page I monitor?

Open Chrome DevTools, go to the Network panel, reload and read the Size column, which Chrome describes as the resource amount transferred over the network. For scripts, use curl with --write-out '%{size_download}', which reports the body bytes without headers.

Is a data endpoint always smaller than a page?

Usually, because it returns only the fields and not the markup, styles, scripts and images. The ratio differs per site, so measure both when both are available.

How do I turn the formula into GB?

Multiply all factors to get kilobytes, then divide by 1,000,000 for GB, as this guide does. In the assumed example, 3,000,000 KB becomes 3 GB. Round up for headers and the occasional larger response.

Per GB or per IP for price monitoring?

Per GB fits many countries and small requests. Per IP fits a job that needs one address fixed for the lease term. Compare using your measured monthly GB.

What happens to traffic I do not use this month?

Purchased traffic does not expire, so the remainder stays available in later months.

Reference links

3
  1. Chrome DevTools: Network panel

    Official documentation · Confirmed on:

    Read on 9 November 2026: DevTools opens with Control+Shift+J or Command+Option+J (Mac), the Console opens by default, and the Size column is described as the resource amount transferred over the network.

  2. curl manual: --write-out

    Official documentation · Confirmed on:

    Read on 9 November 2026: the --write-out option makes curl display information on stdout after a completed transfer, and size_download is the total amount of bytes downloaded, the size of the body or data transferred, excluding headers.

  3. Proxy302 product facts and price list

    Product observation · Confirmed on:

    Product facts file of the site, checked 9 November 2026 against the console, the backend and the price table: products, prices in US$ (1 PTC = US$1), lease terms, protocols and ports, countries, quantity limits, no free trial.

Ready to try it?

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